213442444 has 6 divisors (see below), whose sum is σ = 373524284. Its totient is φ = 106721220.

The previous prime is 213442441. The next prime is 213442451. The reversal of 213442444 is 444244312.

It is not an unprimeable number, because it can be changed into a prime (213442441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26680302 + ... + 26680309.

Almost surely, 2^213442444 is an apocalyptic number.

It is an amenable number.

213442444 is a deficient number, since it is larger than the sum of its proper divisors (160081840).

213442444 is a wasteful number, since it uses less digits than its factorization.

213442444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53360615 (or 53360613 counting only the distinct ones).

The product of its digits is 12288, while the sum is 28.

The square root of 213442444 is about 14609.6695376726. The cubic root of 213442444 is about 597.6224840662.

Adding to 213442444 its reverse (444244312), we get a palindrome (657686756).

The spelling of 213442444 in words is "two hundred thirteen million, four hundred forty-two thousand, four hundred forty-four".